Type-writer.



No. 747,667. v PATENTED DEG..22,1903. R. w. WALKER.

IT YP WRITER; APPLICATION FILED JULY 21. 1903.

ZSHEETS-SHEBT 1.

N0 MODEL.

PATENTED DEG.22,1903.

W. WALKER. TYPE WRITER.

APPLICATION FILED JULY 21,1903.

K0 MODEL- 11/1 tneoxsw j UNI E STATES Patented December 22, 1903.

RAYMOND VF. WALKER, OF

WESTBORO, MASSACHUSETTS.

TYPE-WRlTER.

SPECIFICATION forming part of. Letters Patent N0.. 747,667.dated December 22, 1903- Application filed July 21. 1903.

Massachusetts, have invented an Improvement in Type-Writers, of which the following description, in connection with the aocompanying drawings, is a specification, like char' -acters on the drawings representinglike parts.

The object of my invention is to produce a type-writing machine of the class known as visible writers, in which the type-carrying bars move longitudinally in the are of a circle and in which suitable guiding means or bearings'for said bars are provided, so thatthe action of the bars will be easy and the liability of their getting out of alinement will be reduced to a minimum, and, further, so

' thata type-writer of the above character may be produced which may have nearly twice as many type-bars as maybe employed practically in type writers having swinging or straight longitudinally-movable bars.

In the drawings, Figure 1 is a central vertical section through the line at a: of Fig. 2. Fig. 2 is a front elevation. Fig. 3 is an enlarged section on the line y y of Fig. 1. Fig; ,4 is a plan view. of the typebars and guiding means therefor.

In illustrating my invention I have shown 7 only those parts of a type-writer which directiy cooperate therewith.

g The roll of a type-writer 1s indicatedlat a. A pivot-rodb is supported. in lugs Z), integral with the frame of the machine, and the key-levers c c 0 &c., are ivoted at their:

rear ends to said rod. A'series of circularlycurved type-bars d d d, &'c., areprovided,

said bars being arranged in three rows (see- Fig. 4.) and movable in the are of a circle, one bar in each row being movable longitudinally in approximatelythe same plane as one of the bars in each of the other rows. The'bars are so arranged and movable that their upper ends will all engage squarely the same point on the roll, as indicated in Figs. 1 and 3.

A single type preferably is carried on the.

upper end of each bar, although a head hearing two characters obviously maybe provided when a shift is employed. When the bars are in their retracted position, the type at ably provided which are located in the same plane and said Serial to. 166,423- (No model.)

as practicable. (See Fig.4.) Said bars are respectively connected by links e e e, &c.,'to bell-crank levers ff f the joints between said links and the bars and levers being-ball or universal joints of any suitable character.

rods g g 9 and their opposite ends from the links are connected to the key-levers c 0 c duck, by links h h h, &c.

A series of pairsof guiding plates it, 850., are provided for each set of three bars which are in the same plane, said plates having their adjacent faces, the curve of said grooves the particular bars which are to be. located therein, so that the bars will slide freely there'- in when said plates are held together, as illustrated in Figs. 1, 3, and 4..

from dropping out of the lower. portions of said chambers 7c and the upper plates 3' preventing'the balls in the upperportions from the'hars are forced upward. The balls lanormally rest on said separators k and plates j, respectively; but when a basis forced upwardagainst the platen the balls will be rolled upward,so that the friction between the plates and bars will be minimized.

The guiding -'plates '5 t, 850., are made slightly tapering from their lower ends upward, one pair of said plates being preferfor each set of three bars plates being secured togetheras compactly as possible. I It will be observed that while the middle setof bars is in a vertical plane their ends will bearr'angedas closely together Said levers f f f are pivoted on horizontal curved grooves or gnideways'i t formed inrolling out of the upper ends thereof when.

corresponding, respectively, to the curve of Bearing-ballskare arranged in'ball-chamends of said platestiiarecovered with plates jj, the lower plates 3' preventing the balls the planes of the other sets are oblique, the

degree of obliquity of each plane or set of bars varying according to the distance between it and the middle set.

As the key-lever and hell-crank-levers all operate in vertical planes, therefore, for the connecting-links of all the obliquely-disposed bars to move to a slightlyoblique position from the vertical, as the opcrating-levers are moved to actuate-the bars to which they are respectively connected.

It will be apparent that when a key is depressed the bar connected thereto will he inoved'against the platen, the usual. springactnated harm being employed to retnrn'the keys to their initial position.

. While I have illustrated the use of three rows of type-bars, it will be apparent that four rows maybe provided when it is desired to.

produce a machine that will print a large number of characters, while only two rows of bars will be necessary when a shift is .employed.

Various other changes may be madewithout departing from the spirit and scope of my invention.

Having th us described my invention, what I claim as new, and desire to secure by Letters Patent, is- I 1. A type-writer eomprisinga series of circularly-curved bars having type at their ends, a series of guides therefor, and means for moving said bars longitudinally between said guides in the arc of a circle, substantially as described.

2. Atype-writer comprising a series of circularly-curved bars having type at their ends, a series of pairs of guiding-plates, each pair arranged at opposite sides of one of said bars,

and means for holding them together, and means for moving said bars longitudinally between saidguides in the arc of a circle, substantially as described.

3. A type-writer comprisinga series of cirit is necessary,

I cularly-curved bars having type at theirends, guiding devices therefor between which said bars are movable longitudinally in the are of a circle, said guiding devices having elongated hall-containing chambers adjacent said bars to provide hearings therefor, and operating means for said bars, substantially as described.

4. A type-writer com prising a series of circularly-curved bars having type at their ends, a series of pairs of guiding-plates, each pair arranged at opposite sides of one of said bars,

chambers adjacent said bars to provide bearlongitndinally in the arc of a circle, between said balls, substantially as described.

5. A type-writer comprising a series of circularly-curved bars having type at their ends, guiding devices therefor between which said bars are movable longitudinallyin the arc of a circle, said guiding devices having elonhars, ball-separating means midway of said RAYMOND W. WALKER. Witnesses:

LOUIS H. HARRIMAN,

MAUD M. PIPER.

gated hall-containing chambers adjacent said chambers,a hall being provided at each side of said plates having elongated hall-containing ings therefor, and means for moving said bars 

